Actions
All four quadriceps are powerful extensors of the knee joint. They are crucial in walking, running, jumping and squatting. Because rectus femoris attaches to the ilium, it is also a flexor of the hip. This action is also crucial to walking or running as it swings the leg forward into the ensuing step. The quadriceps, specifically the vastus medialis, plays the important role of stabilizing the patella and the knee joint during gait.
Read more about this topic: Quadriceps Femoris Muscle
Famous quotes containing the word actions:
“Your toddler is no longer a baby feeling himself as part of you, using you as his controller, facilitator, his mirror for himself and the world. But he is not yet a child either; ready to see you as a person in your own right and to take responsibility for himself and his own actions in relation to you.”
—Penelope Leach (20th century)
“Piety practised in solitude, like the flower that blooms in the desert, may give its fragrance to the winds of heaven, and delight those unbodied spirits that survey the works of God and the actions of men; but it bestows no assistance upon earthly beings, and however free from taints of impurity, yet wants the sacred splendour of beneficence.”
—Samuel Johnson (1709–1784)
“The first glance at History convinces us that the actions of men proceed from their needs, their passions, their characters and talents; and impresses us with the belief that such needs, passions and interests are the sole spring of actions.”
—Georg Wilhelm Friedrich Hegel (1770–1831)